Improvement in molding pipes



. ZSheets--Sh'eet 1. J. D. OHNSON.

Mgldng Pipes.

N0. 133,584. Patented Dec.3,1872.

WlTNESSES NVENTOR 1.0. SON.

Moldi ipes.

. No. 133,584. Patented 1360.3;18-72. I

. A NvEToR WINESSES l H gzofzM/z ma/. WM l UNITED STATES PATENT OEEIOE.

JOHN D. JOHNSON, OF HAINESPORT, NEW JERSEY.

VIMPROVEMENT VIN MOLDING PIPES.

Specification forming part of Letters Patent No. 133,584, dated December3, 1872.

To all whom'it may concern.'

Be it known that I, JOHN D. JOHNSON, of Hainesport, in the county ofBurlington and State of New Jersey, have invented certain Improvementsin Molding Pipe-Fittings, Ste., of which the following is aspecification:

My invention relates to the combination of half patterns of branchpipes, elbows, Or other card which is beneath the 4follow-board beingconnected by hinges E E. Fig. 2, Sheet No. 2, is a longitudinal sectionat the broken line w w of Fig. l.

Like letters in both gures indicate the same parts.

A is the card. B B are half patterns of a branch pipe, conned onpedestals G, that are permanently connected with the card equidistantfrom the middle of the same. D is the follow-board. It has openings, et,which tit over the pedestals @and when in position on the card, asrepresented in Fig. 2, its upper surface coincides with the upper sidesof the pedestals and the at or middle surface of the patterns connectedwith the same. The followboard D is connected with the card A at one endby means of the hinges E E, to provide for conveniently raising it torelieve the mold from the patterns, and afterward returning it to itsformer connection with the card and patterns, which it assumes in Fig.2.

The operation is as follows: The followboard D being in its lowestposition, as represented in Fig. 2, and lying flat upon the card A, andthe openings a fitting closely around the patterns B B, the drag part ofthe flask is laid thereon,loeing held accurately in place by means ofdowels, or otherwise. Then the sand is rammed around the patterns in theusual manner, and the follow-board turned ou its hin ges until the moldis raised freefrom the patterns. Then the free end of the follow-boardis propped up in any convenient manner, and the drag removed therefromand turned over, ready for the reception of the cope. The follow-boardis then brought down to its former position and the cope connectedtherewith, and, after the molding has been completed, removed in likemanner as the drag from the patterns, and connected with the drag.

I make the card and follown board long enough to place the hinges atsuch a distance from the front edges Of the patterns as may be necessaryto prevent the breaking ofthe sand as the mold is swung o the patterns.

I have represented but a single pair of patterns, but it will readilyappear that any convenient number may be used.

I have represented in the drawing branchpipe patterns, yet it will beseen that the invention will equallyapply to other tttin gs and to otherdescriptions of castings.

I claim as my invention- The hinged connection of the followboard D withthe card A, the card being provided with patterns mounted on stationarypedestals C and the follow-board with openings a, substantially in themanner and for the purpose above described.

- JOHN D. JOHNSON. Witnesses: y

J No. C. TEN EYoK, F. B. LEVIS.

